You only make gain when you do more weight then your accustomed to doing right... so does that mean all the reps you do in between that are useless??
Say for example i am doing a dumbell should press
-1- I do 60 pounds on each hand say 10 times and the last 2 i struggle on
-2- I do 85 pounds on each hand say only 4 times but all i strugle on all 4
Tecnically i would figure the the second option is more beneficial to gain muscle.
Now if my routine consists of sets similar to the first option im just doing more work then i have to or am i ... doing more work must lead to more caloire burning BUT if im struggling on more reps like in option 2 then aint i burning more calories while im pushing harder ???
Bottom line is should i switch my routine to lower heavier reps, like 4-6 reps for each set?
Now i know when you work a muscle to failure which would happen quicker with the second option that also means the time to heal takes longer and if that happens then my next work out might suffer in gains and i would need more rest.
It all about the happy medium and finding it aint it lol